Add Marlin firmware. Has initial configuration for CoreXY and 1 servo.

Update CAD file with improved clearances for Pilot G2 cartridge clearances after first print.

Marlin Firmware/buildroot/tests/ARMED

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+#
+# Build tests for STM32F1 ARMED
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+use_example_configs ArmEd
+opt_set X_DRIVER_TYPE TMC2130 Y_DRIVER_TYPE TMC2208
+opt_enable LASER_SYNCHRONOUS_M106_M107
+exec_test $1 $2 "ArmEd Example Configuration with mixed TMC Drivers" "$3"
+
+# clean up
+restore_configs